After casting a spell, Shen gains a 50-101 (+12% per bonus health) shield for 2.5 seconds (10 second cooldown). Spells that successfully affect an allied or enemy champion reduce this cooldown by 4-7.5 seconds (depending on level).
Shen's power manifests as a spirit blade that he can control with abilities.
(+12% per bonus health)
The way this is worded is a little confusing, since it sounds like 1 bonus HP increases the base shield value by 12%. I think it'd be better to write (+12% bonus health). Also if you remove the brackets you're left with "gains a 50 shield for 2.5 seconds", which sounds weird too. Probably would be good if the "a" is removed there so it sounds smoother.
The way this is worded is a little confusing, since it sounds like 1 bonus HP increases the base shield value by 12%. I think it'd be better to write (+12% bonus health). Also if you remove the brackets you're left with "gains a 50 shield for 2.5 seconds", which sounds weird too. Probably would be good if the "a" is removed there so it sounds smoother.